CVE-2023-45554

File Upload vulnerability in zzzCMS v.2.1.9 allows a remote attacker to execute arbitrary code via modification of the imageext parameter from jpg, jpeg,gif…

Critical · published October 24, 2023

CVSS v3.1
9.8
EPSS
2%
Percentile
74.4
In the wild
Unconfirmed
What it is

🚨 A sneaky trick lets attackers change file types in zzzCMS v2.1.9! Just by altering the imageext parameter, they can execute arbitrary code. 🔥 Think of this like a restaurant that lets a diner swap their dessert order for a dish that’s not on the menu, like a 5-star gourmet dish that could ruin the whole kitchen if it goes awry! 🎩 With this vulnerability, an attacker could upload malicious files disguised as harmless images, leading to complete control over the server. This could mean unauthorized access to sensitive data, system compromise, or even launching attacks against other systems. Absolutely devastating!

Put simply

Think of this like a restaurant that lets a diner swap their dessert order for a dish that’s not on the menu, like a 5-star gourmet dish that could ruin the whole kitchen if it goes awry! 🎩 This file upload vulnerability allows attackers to bypass file type restrictions by modifying the imageext parameter, enabling them to upload and execute arbitrary code on the server.

What to do

With this vulnerability, an attacker could upload malicious files disguised as harmless images, leading to complete control over the server. This could mean unauthorized access to sensitive data, system compromise, or even launching attacks against other systems. Absolutely devastating! Update zzzCMS to the latest version immediately to patch this vulnerability. Additionally, implement strict validation on all file uploads and consider whitelisting allowed file types to enhance security. 🛡️ You've got this! By taking these steps, you can lock down your system and keep it safe from bad actors. 💪✨

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01519 · 74.4th percentile
Published
2023-10-24T00:00Z
EPSS history
Timeline
  • 24 OCT 00:00Z
    File Upload vulnerability in zzzCMS v.2.1.9 allows a remote attacker to execute arbitrary code via modification of the imageext parameter from jpg, jpeg,gif…
    cvelistv5